Uber has for years engaged in a worldwide program to deceive the authorities in markets where its low-cost ride-hailing service was being resisted by law enforcement or, in some instances, had been outright banned.

The program, involving a tool called Greyball, uses data collected from the Uber app and other techniques to identify and circumvent officials. Uber used these methods to evade the authorities in cities such as Boston, Paris and Las Vegas, and in countries like Australia, China, Italy and South Korea.

Greyball was part of a broader program called VTOS, short for “violation of terms of service,” which Uber created to root out people it thought were using or targeting its service improperly. The VTOS program, including the Greyball tool, began as early as 2014 and remains in use, predominantly outside the United States. Greyball was approved by Uber’s legal team.

Greyball and the broader VTOS program were described to The New York Times by four current and former Uber employees, who also provided documents. The four spoke on the condition of anonymity because the tools and their use are confidential and because of fear of retaliation by the company.Continue reading the main story

Uber’s use of Greyball was recorded on video in late 2014, when Erich England, a code enforcement inspector in Portland, Ore., tried to hail an Uber car downtown as part of a sting operation against the company.